It will be interesting to watch Apple in the near-future and see them expand into other product arenas. Can you imagine if they built spacecraft? They'd give Elon Musk some real competition (maybe real soon in the area of electric cars).
But, their luxury of having "infinitely deep pockets" may have left them "'way behind the learning curve" (inside joke there for those skilled in the art) on the equally- powerful discipline of "Design To Cost"...